Cotton plant had made intensive and scultinized land use pattern with main crops in paddy field in Edo era, but the spreading area of that pattern was not so wide. It was capable only under the condition of fertile paddys with draining well. Cotton plant raised on upland was mostly growed under the successive land use pattern. In Meiji era, most of experienced veteran farmers had realized that crops should principally be raised under the proper rotation. However, cotton plant had been recognized exceptionally to be able, furthermore, to be suitable to raise successively, without any rotation. It is regretable that the precious experience of Japanese farmers to raise cotton plant with intensive and scultinized land use pattern had not been utilized to modernization of Japanese farming system since Meiji era.
Chinese rapid economic development has make its suburban rural become richer than its other rural areaes since 1980's. However, changes of rural societies and differentiation of the peasant start with the introduction of market economy and the the function of village governing peasants decreases with the disintegration of People's Community. The money worship reduce supervision to basic-level cadre in these areaes. Therefore, various social problems have also been produced in the developed rural. The purpose of this paper is to analyse the structure of social problems in rural china and its background with an example of Shanghai's surburb rural in the process of economic development, its results are as follow: (1) in all social problems, the first important social problem to effect the daily living of peasants is the deterioration of social order, and the second is gamblem. (2) The stealing crimes fastly increase with rapid economic development, especially, the stealing crimes increase further with increasing of peasants working away from the less developed rural areaes. (3) The civil disputes in the rural have mainly concentrated on the troubles on house land ownership between peasant families. (4) In recent years, the relationship between cadres and peasants becomes more antagonistic.